Qt5中进行OpenCV开发教程

Qt中进行OpenCV开发：
1）首先新建一个工程，在.pro工程文件中进行配置：添加OpenCV的头文件目录和库文件路径，具体如下（根据自己OpenCV的安装路径设置）

1 INCLUDEPATH += C:\OpenCV2.3.1\build\include 2    C:\OpenCV2.3.1\build\include\opencv  3    C:\OpenCV2.3.1\build\include\opencv24 5 LIBS += C:\OpenCV2.3.1\build\x86\vc9\lib\opencv_highgui231.lib 6     C:\OpenCV2.3.1\build\x86\vc9\lib\opencv_core231.lib  7     C:\OpenCV2.3.1\build\x86\vc9\lib\opencv_imgproc231.lib

 

2）以下是一个具体的简单实例——在自定义的Widget中显示以张图片，源码如下：

//------widget.h　

 1 #ifndef WIDGET_H 2 #define WIDGET_H 3  4 #include <QWidget> 5 #include <QImage> 6 #include <opencv.hpp> 7  8 class Widget : public QWidget 9 {10     Q_OBJECT11     12 public:13     Widget(IplImage *img,QWidget *parent = 0);14     ~Widget();15 protected:16     void paintEvent(QPaintEvent *);17 private:18     IplImage *iplImg;19     QImage *qImg;20 };21 22 #endif // WIDGET_H

//------widget.cpp

 

 1 #include "widget.h" 2 #include <QPainter> 3 Widget::Widget(IplImage *img, QWidget *parent) 4     : QWidget(parent) 5 { 6     qImg = new QImage(QSize(img->width,img->height),QImage::Format_RGB888); 7     iplImg = cvCreateImageHeader(cvSize(img->width,img->height),8,3); 8     iplImg->imageData = (char *)qImg->bits(); 9 10     if(img->origin==IPL_ORIGIN_TL)11     {12         cvCopy(img,iplImg,0);13     }14     else15     {16         cvFlip(img,iplImg,0);17     }18     cvCvtColor(iplImg,iplImg,CV_BGR2RGB);19     resize(img->width,img->height);20 }21 22 void Widget::paintEvent(QPaintEvent *)23 {24     QPainter painter(this);25     painter.drawImage(QPoint(0,0),*qImg);26 }27 28 29 Widget::~Widget()30 {31     cvReleaseImage(&iplImg);32     delete qImg;33 }

 

//----main.cpp

 1 #include "widget.h" 2 #include <QApplication> 3  4 int main(int argc, char *argv[]) 5 { 6     QApplication a(argc, argv); 7  8     IplImage *img = cvLoadImage("test.jpg",1); 9 10     if(img)11     {12         Widget *w = new Widget(img);13         w->show();14     }15 16     int re =  a.exec();17     cvReleaseImage(&img);18 19 20     return re;21 }

3)运行结构如下